TASC8/KASC15 — 8th TESS/15th Kepler Asteroseismic Science Consortium Workshop
Published August 8, 2024 | Version v1
Poster Open

Fitting surface-independent phase shift differences

Authors/Creators

  • 1. ROR icon Aarhus University
  • 2. ROR icon Queen Mary University of London
  • 3. ROR icon Indian Institute of Technology BHU
  • 4. ROR icon Centro de Astrofísica da Universidade do Porto
  • 5. ROR icon University of Birmingham

Contributors

  • 1. ROR icon Centro de Astrofísica da Universidade do Porto
  • 2. ROR icon Universidade do Porto

Description

With the great inference power asteroseismology brings to model fitting of stars, one of the greatest challenges is the asteroseismic surface effect. While it has previously been circumvented using combinations of individual frequencies, most often the frequency separation ratios, they are derived using several approximations, which decreases the precision of the inferred parameters. Here, we present the epsilon differences method, which relies on how specific combinations of individual frequencies cancel out the contribution from the surface, derived using less approximations than frequency separation ratios, and show how it performs in comparison to the established methods.

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Epsdiff_poster.pdf

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